From owner-freebsd-questions  Mon Apr  1 15:59:35 2002
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Date: Mon, 01 Apr 2002 17:59:23 -0600
To: freebsd-questions@freebsd.org
From: Oscar Ricardo Silva <oscars@mail.utexas.edu>
Subject: Mismatch between drive size being reported
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I have a machine running FreeBSD 4.5-STABLE.  I added a Promise Ultra66 
card and connected a Seagate 80GB (ST380021A) drive.  dmesg gives the 
following:

ata2: at 0xd400 on atapci1
ata3: at 0xdc00 on atapci1
ad0: 12971MB <WDC WD136AA> [26354/16/63] at ata0-master UDMA33
ad4: 76319MB <ST380021A> [155061/16/63] at ata2-master UDMA33


After creating a "dangerously dedicated" partition, and formatting the 
drive (mounts as /hold):

 > cat /etc/fstab
# Device                Mountpoint      FStype  Options         Dump    Pass#
/dev/ad0s1b             none            swap    sw              0       0
/dev/ad0s1a             /               ufs     rw              1       1
/dev/ad0s1f             /usr            ufs     rw              2       2
/dev/ad4s1e             /hold           ufs     rw              2       2
proc                    /proc           procfs  rw              0       0

I see the following:

 > df
Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
/dev/ad0s1a    992239   230333   682527    25%    /
/dev/ad0s1f  11130442  2200211  8039796    21%    /usr
/dev/ad4s1e  75749460        1 69689503     0%    /hold
procfs              4        4        0   100%    /proc

or

Filesystem    Size   Used  Avail Capacity  Mounted on
/dev/ad0s1a  1016M   236M   699M    25%    /
/dev/ad0s1f    11G   2.3G   8.2G    21%    /usr
/dev/ad4s1e    78G   1.0K    71G     0%    /hold
procfs        4.1K   4.1K     0B   100%    /proc


It's been a long day and I'm slow on the draw ... OK, maybe not just today 
... but why only 71GB available?

In case it helps, here's the output from fdisk:

 > fdisk /dev/ad4
******* Working on device /dev/ad4 *******
parameters extracted from in-core disklabel are:
cylinders=91888 heads=27 sectors/track=63 (1701 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=91888 heads=27 sectors/track=63 (1701 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165,(FreeBSD/NetBSD/386BSD)
     start 0, size 156301488 (76319 Meg), flag 80 (active)
         beg: cyl 0/ head 0/ sector 1;
         end: cyl 1023/ head 26/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>


Any information would be appreciated.


Oscar


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